Research on Reliability of Distribution Network Based on Grid Cyber-Physical System and Telecontrol System

摘要

Generally, we can speed up fault location procedures and reduce the recovery time via installing telecontrolled and automated sectionalizers in distribution networks. Besides, circuit breakers can also be installed in the network to reduce the average number of users' outages. However, the number of circuit breakers (CBs) is limited by the time selectivity. In smart grid perspective, the usage of telecontrolled CBs can overcome this limitation in a grid cyber-physical system (GCPS). In this paper, we provide a theoretical formulation to assess the impact of GCPS vulnerability and centralized telecontrol system(CTS) availability on networks. In order to solve this problem, we consider two cases where islanding is permitted or not. The results have shown that when the GCPS is vulnerable, islanding obviously reduces the outage duration. In addition, when the GCPS security level is very high, islanding can still reduce the outage rate.